Mark twain

Each man must for himself alone decide what is right and what is wrong, which course is patriotic and which isn't. You cannot shirk this and be a man. To decide against your conviction is to be an unqualified and excusable traitor, both to yourself and to your country, let men label you as they may.

“Loyalty to country ALWAYS. Loyalty to government, when it deserves it.” 

“There are two kinds of patriotism -- monarchical patriotism and republican patriotism. In the one case the government and the king may rightfully furnish you their notions of patriotism; in the other, neither the government nor the entire nation is privileged to dictate to any individual what the form of his patriotism shall be. The gospel of the monarchical patriotism is: "The King can do no wrong." We have adopted it with all its servility, with an unimportant change in the wording: "Our country, right or wrong!" We have thrown away the most valuable asset we had:-- the individual's right to oppose both flag and country when he (just he, by himself) believed them to be in the wrong. We have thrown it away; and with it all that was really respectable about that grotesque and laughable word, Patriotism.”